Directions
Peter is shopping for a mattress at The Princess and the Pea Mattress Store. After testing out a few brands, he settles on a Sleep Tight mattress, priced at $330, plus 8% tax.
The Princess and the Pea Mattress Store offers an installment plan. The store will allow Peter to pay for the mattress in 3 monthly installments of $110. For this service, they charge 5% of the cost of the mattress, before tax.